[FFmpeg-devel] [PATCH] ffmpeg: add 100ms delay for first stats

[Gyan Doshi]

On 23-12-2020 03:35 pm, Nicolas George wrote:
> Gyan Doshi (12020-12-23):
>> Which piece of info or object would indicate that? At the stage of this
>> check, I don't see any available.
> Read Michael's mail:
>
> Output #0, avi, to 'file.avi':=       0kB time=-577014:32:22.77 bitrate= -0.0kbits/s speed=N/A
>
> The problem is obviously the time. The large negative number looks like
> it was converted from AV_NOPTS_VALUE, so test if the PTS being printed
> is AV_NOPTS_VALUE or not.

That's not the issue. It's the mangled line - the output from 
lavf/dump.c. mangled with stats line

AV_NOPTS_VALUE is an acceptable value and already checked for at line 
1815. As is <=0 output size.

Indicating to the user that ffmpeg processing has stalled at the 
beginning is a valid and acceptable outcome, even a necessary one.
The delay here is just to avoid the mangling. Some hardcoded value is 
the best that I see we can do, but if you have an analytical solution, 
I'm all ears.

Regards,
Gyan